Osajono

#include <string.h>
#include <stdio.h>
#include <iostream>

using namespace std;

#define ull unsigned long long

int main() {
    cin.sync_with_stdio(false);
    char input[100000];
    cin >> input;
    ull l = strlen(input);
    ull i;
    int a[256];
    int summa = l;
    for (i = 0; i < 256; i++)
        a[i] = 0;
    for (i = 0; i < l; i++)
        summa+=(a[0+input[i]]++);
    cout << summa << "\n";
    return 0;
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: ACCEPTED

Test 11

Group: 3

Verdict: WRONG ANSWER

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: WRONG ANSWER

Test 14

Group: 3

Verdict: WRONG ANSWER

Test 15

Group: 3

Verdict: WRONG ANSWER